ＩＭＺインプラントの緩衝機構に関する実験的研究　第２報　動的荷重下における単独インプラント周囲の歪み

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  • Stress-Transfer Characteristics of Stress-Absorbing Elements in the IMZ Implant System. Part II. Stress around a Freestanding Single Implant under Dynamic Loading Conditions.
  • Part II. Stress around a Freestanding Single Implant under Dynamic Loading Conditions
  • 第2報動的荷重下における単独インプラント周囲の歪み

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The IMZ implant system incorporates stress-absorbing elements, such as the intramobile element (IME). There are varying reports regarding the characteristics of the IME however, its effectiveness is still controversial.<BR>In order to evaluate the effectiveness of the stress-absorbing elements under dynamic loading conditions, the stress-transfer characteristics around a single freestanding IMZ implant were investigated with three types of internal elements: an IME made of polyoxymethylene, an intramobile connector (IMC) consisting of a polyoxymethylene head and titanium screw, and a metal element (Metal-E) made of stainless steel.<BR>The vertical (10-kgf) and horizontal (2-kgf) dynamic forces applied to the surface of the superstructure and the strain values around the implant were measured with the strain gauges.<BR>The results were as follows:<BR>1. Under axial dynamic force, the three types of elements had no significant difference in the stresses around a single freestanding implant.<BR>2. Under vertical tilting dynamic forces, a more uniform stress around a single freestanding implant was observed with IME and IMC than Metal-E.<BR>3. Under horizontal dynamic force, a more uniform stress around a single freestanding implant was observed with IME and IMC than Metal-E.<BR>The stress-absorbing elements were significantly effective under the dynamic conditions, while they were not effective under the static conditions.

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